書誌事項
- タイトル別名
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- U-Pb zircon ages of granitic rocks from Kagasawa, Hida Mountains
- ヒダ サンチ カガ サワ ノ カコウガンルイ ノ ジルコン U-Pb ネンダイ
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説明
<p>Laser-ablation ICP-MS U−Pb dating was carried out on rock samples from granitic dikes of the Hida Metamorphic Belt at Kagasawa, Toyama City, where Precambrian Rb−Sr whole-rock ages disagree with Triassic (240-230 Ma) CHIME zircon ages. Two medium-grained granodiorite samples yielded zircon 238U-206Pb weighted mean ages of young age clusters of 241.3±3.0 Ma and 229.3±1.9 Ma, and a coarse-grained granite yielded a zircon 238U-206Pb weighted mean age of 241.4±2.0 Ma. These ages are similar to the CHIME zircon ages. The medium-grained granodiorites contain several Precambrian zircons with core ages of ca. 2500 Ma, 2000 Ma, and 1600 Ma. The coarse-grained granite, however, contains no older zircon.</p>
収録刊行物
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- 地質学雑誌
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地質学雑誌 125 (6), 453-459, 2019-06-15
一般社団法人 日本地質学会
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詳細情報 詳細情報について
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- CRID
- 1390564227302439168
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- NII論文ID
- 130007706717
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- NII書誌ID
- AN00141768
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- ISSN
- 13499963
- 00167630
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- NDL書誌ID
- 029906022
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可